<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>水波纹效果</title>
  <style>
    .wave-content {
      height: 666px;
      width: 666px;
      left: 255px;
      top: 139px;
      position: relative;
    }

    .wave {
      position: absolute;
      left: 0px;
      top: 0px;
      height: 100%;
      width: 100%;
      transform-origin: center center;
      background-color: transparent;
      border: 1px solid #979797;
      animation-duration: 7s;
      animation-name: wv;
      animation-timing-function: linear;
      animation-iteration-count: infinite;
      border-radius: 50%;
      opacity: 0;
    }

    .wave1 {
      animation-delay: 0s;
    }

    .wave2 {
      animation-delay: 1.5s;
    }

    .wave3 {
      animation-delay: 3s;
    }

    .wave4 {
      animation-delay: 4.5s;
    }

    @keyframes wv {
      0% {
        opacity: 0;
        transform: scale(0.5);
      }

      30% {
        opacity: 0.7;
        transform: scale(0.65);
      }

      70% {
        opacity: 0.1;
        transform: scale(0.85);
      }

      100% {
        opacity: -0.2;
        transform: scale(1);
      }
    }
  </style>
</head>
<body>
  <div class="wave-content ">
    <div class="wave wave1 "></div>
    <div class="wave wave2 "></div>
    <div class="wave wave3 "></div>
    <div class="wave wave4"></div>
  </div>
</body>
</html>